Incandescent multiple-circuit electric lamp.



C. GARANGELO.' NCANDESCENT MULTIPLE CIRCUIT ELECTRIC LAMP.

APPLICATION FILED SEPT.14, 1910.

1.0299851, Patented June 18,1912.

3 SHEETS-SHEET 1.

C. GARANGELO. INOANDBSGLNT MULTIPLE CIRCUIT ELECTRIC LAMP.

APPLICATION FILED SEPT. 14, 1010.

Patented June 18, 1912.

3 SHEETS-SHEET 2.

n C. GARANGELO. 4INCNDESCENT MULTIPLE CIRCUIT ELECTRIC LAMP.

APPLICATION FILED SEPT. 14, 1010.

1,029,8 5 l Patented June 18, 1912.

3 SHEETS-SHEET 3.

w/ rmi-S355 4UNITED sTATEs PATENT oEEToE.

CONSTANTI-N CARANGELO, 0F DELTA BRRAGE, NEAR CAIRO, EGYPT.

INCANDESCENT MULTIPLE-CIRCUIT ELECTRIC LAMP.

" Application led September 14, 1910. Serial No. 581,994.

.hasfor its object to provide means whereby the various circuits may' be completed either separately or simultaneously, whereas the said lamps may be adjustedl to any desired positions and are made forany of the usual tensions. This lamp system has not only vthe advantage to allow of the lighting intensit-y tol bemodified as. desired, but also to provide a more durable lamp, since the total life of the lamp may be equal to the added lives of both circuits, the total life being shortened when the circuits are operating simultaneously in parallel. In this' lamp, the two circuits completed by the filaments, `for example by the metal filaments, are either arranged above each other or side by side and mounted in parallel. Both circuits ma be either Aof the same intensitiesor of different intensities, so that I may obtain, in the first instance:

5, 10 or 15 candles 15, 30 45 45, 9o t 135 and in the-second instance:

5, 5 or 10 candles 10, 10 20 20, 20 40 These lamps may be made on the one I hand with a special plug adapted to be engaged either 1n a' bayonet-Socket or in a screw-socket. In this case the plug may be adjusted with regard to the socket in various separate positions corresponding to the various mountings which maybe used.

Assuming for example that the lamp has two circuits three positions will result viz: 1first circuit only closed; 2, second circuit only closed; 3, both circuits closed together `in parallel; These lamps may also be provided with outer independent switches, whereby the use will be more convenient.

Specification of Letters Tatent.

Patented June 18, 1912.

`bodiedin this invention can be adapted to existing sockets.

Thisinvention will be more clearly understood with reference to the annexed rawings in which lamps are shown ascomprising two circuits, but it will be obvious that lamps can b made with a larger number of circuits or lights without departing from the principle of the invention.

In the accompanying drawings, Figure 1 illustrates a lamp for bayonet connection embodying this -invention Fig. 2 illustrates a form of the lamp when combined with an independent switch. Fig. 3 shows, this `lamp for screw connection instead of bayonet connection. Figs. 4, 5 and 6 show the automatic switch in front view, side view and back view respectively; Figs. 7, 8, 9, 10 and 11 show the various positions corresponding vto the different combinations for lighting. .Fig 12 is a cross section showing the'glass support for the disk. Figs. 13, 14, l5, 1G are plan views `of the four disks with filament supports. Fig. 17 is a modification of Fig. 1G.

In Fig. l is shown a lamp for bayonet connection without independent switch. The negative wires (L ll) of both lamp circuits terminate at the contacts 1 b1 respectively and the positive wire c is connected to the larger contact c1, these three contacts being so arranged as to form a trian le on the upper surface ot' the plug. The soc et A conforming to existing sockets of standard design is provided with two spring contacts' (Z e and is only modified in that each ofthe horizontal grooves f of the bayonet connection comprises three notchesin which are engaged the pins la of the plug. This enables the plug'ot the lamp to be brought into the positions shown in dotted lines v/-y, ams, with regard to its socket, the first of which corresponds to the closing of the circuit of the upper light, the pring contact Z bcaringon the contact al, and the spring contact c on the contact c1, the second corresponds to the parallel closing oi"l the circuit of both lights, the spring contact (Z bearin .on the contacts u1 vb simultane'ously an the spring Contact e always corresponds to the closing of the circuit of yof eccentric cam c2.

the lower light, "the spring contact d bearing on the contact b1, whereas the spring Contact e always remains in Contact with 01.

In the case of a screw connection, the plugl vwill be provided with one spring Contact Aonly instead 'of two and the common return wire or the current supply wire will be connected to the plug `forming a mass.

' v 'ln' the Figs. 2 and 3 are shown two types of lamp with multiple-circuit one made forv bayonet connection, the other for screw connection, in the case where anl independent switch is used. This switch comprises a push a2 which when pressed successively, enables the current to flow either through the first or through the second or third circuits or through both circuits simultaneously and then to cut the same. To this end, the pressure exerted on the push a2 is transmitted to a rod b2 which causes the rotation of a kind This eccentric cam c2 is constituted through a parallelepipedic mass l carrying a double symmetric cam 2 21 at one end and an eccentered cam 3 at the other end. This member rotates about an axis 5 held in a support within the switch and between a contact piece al connected to the return wire on the one hand and between two spring blades e f connected to the two current supply wires on the other hand, the in'- sulation being eected by suitable means.

In the position shown in Fig. 7 the double cam 2, 21 for example being placed vertically no part of the member c2 touches the two blades c f, which are at est. There is no contact between the supply wire and the return wire: the circuit is interrupted and the lamp is out. ln the position shown in Fig'.

8 one of the sections of the cam., 2 for example, is encountering a spring blade c or f,

thus completing the circuit between the reL turn wire and one of the supply wires; one of the lights is then on. in the position shown in Fig. 9 the other light is on. In the position shown in Fig. 1() both lights are on at the same time and in the position shown in Fig. l'l which is the same as shown in Fig. 7 the lamp is again out.

The plug of the lamp is divided in two parts A1 B1 and to the part A1 is added a porcelain disk C, having current supply screws on its upper part. The direction of the current is indicated by the arrows. Owing to the interposition oi3 this disk the plug of the lamp is entirely the same as that ot ordinary lamps. and it will be seen that it may be adapted to any, bayonet or screw soclret, contrary to the already `known types of multiple circuit lamps.

ln the case of a bayonet-,lamp, it will be necessary to provide fourI screws on the porcelain C. @ne of these four screws, such as t?, receives the current from the conaoaaeai l through the second contact ll of the plug B1. .In the case of a screw lamp the plug itselfis used as a contact and leads the ourn rentl to both circuits; the current of the two 4circuits flows out through the screws 12 and ,'13, goes to the switch and the circuit is completed through the third screws'and the oonv tact l5; there is thus three screws only in such. case. rlhe iilamentsY are then-connected in the following manner: 0n theglass supprt Gr are arranged' four disks such as F F1 F2 F3 which are made of porcelain, glass or any other insulatingjnaterial with central bores in which are interposed hollow cork or asbestos washers i1. 77,1 h2 7a3. These washers have a central bore through which passes the glass support or stern G, and owing to the elasticity of the cork or asbestos the disks are held on the support by their disks are arranged the supports, such as l. These supports are constituted by a spiral wound copper wire inserted in the porcelain dish' and carrying aY small argentan post z'. They can also be replaced by supports such as at L, Fig. 17. With this device, the supports and the filaments oit' the lamp are fastened, without solder, by heating in a flame jet and thereby render the construction of the lamp much more simple. It will be obvious that this special arrangement of the insulating disks can be adapted lto the ordinary 'lamps in the trade.

The' switch can be used for lightino' the Various lights of any number of multiple circuit lamps arranged in a group separately and simultaneously, or for putting them of single circuit lamps arranged in a group, and in the latter case it has a great economical advantage on the ordinary switches for `single circuit lamps arranged in a group, owing to the fact that the usual switches now in use involve considerable expense in the whereas thepresent switches only require half a meter4 of cord for the same purpose.

l claim:

l. In an'incandescent lamp having metal filaments, a glass support-ing rod and insulat ing, disks which are formed with a central opening in which is inserted a corlr ring or washer through which passes the glass rod of the lamp, the 4velasticity of the cork being sutlicient to hold the disks on the stem.

ing filaments, insulating disks for supportand a resilient packing betweensaid supi port and disks.

3. An incandescent electric lamp, comprisown pressure. @n the periphery of the said arrangement oi electric wires or cords 2. nincandescent electric lamp, comprisi out. lt can also be adapted to any number ing said filaments,l a support for said disks ing filaments, insulatingdisks having proresilient packing between said projections 10 jections for supporting said filaments, a supand filaments.

port for said disks and a resilient packing In witness whereof I have hereunto set my between said support and disks. hand 'in presence of two 'witnesses 4. An incandescent electric lamp comprisn i f1 ing filaments, insulating disks hai/ing pro- CONSrlANlIN CRANULLO' jections for supporting said ilaments,. ar- Witnesses: gentan bonds between said projections and ARMENGAUD, Jeune,

filaments, a supportfor said disks and a H. C. COXE. 

